General project: Sales of building decoration materials; Sales of building materials; Sales of architectural ceramic products; Manufacturing of lightweight building materials; Sales of lime and gypsum; Wood sales; Sales of mining machinery; Internet sales (excluding the sale of licensed goods); Sales of metal tools; Import and export of goods (except for projects that require approval according to law, business activities shall be conducted independently based on the business license in accordance with the law). Licensed project: Residential interior decoration and renovation (for projects that require approval by law, business activities can only be carried out after approval by relevant departments. The specific business projects shall be subject to the approval documents or licenses of relevant departments).